title: Angiographic evaluation of carotid artery grafting with prefabricated small-diameter, small-intestinal submucosa grafts in sheep.
abstract: The purpose of this study was to report the longitudinal angiographic evaluation of prefabricated lyophilized small-intestinal submucosa (SIS) grafts placed in ovine carotid arteries and to demonstrate a variety of complications that developed. A total of 24 grafts, 10 cm long and 6 mm in diameter, were placed surgically as interposition grafts. Graft patency at 1 week was evaluated by Doppler ultrasound, and angiography was used for follow-up at 1 month and at 3 to 4 months. A 90% patency rate was found at 1 week, 65% at 1 month, and 30% at 3 to 4 months. On the patent grafts, angiography demonstrated a variety of changes, such as anastomotic stenoses, graft diffuse dilations and dissections, and aneurysm formation. These findings have not been previously demonstrated angiographically by other investigators reporting results with small-diameter vessel grafts made from fresh small-intestinal submucosa (SIS). The complications found were partially related to the graft construction from four SIS layers. Detailed longitudinal angiographic study should become an essential part of any future evaluation of small-vessel SIS grafting.
authors.affiliation: Dotter Interventional Institute, Oregon Health Sciences University, Portland, OR 97201, USA. pavcnikd@ohsu.edu
authors.forename: Dusan
authors.initials: D
authors.lastname: Pavcnik
authors.forename: Josef
authors.initials: J
authors.lastname: Obermiller
authors.forename: Barry T
authors.initials: BT
authors.lastname: Uchida
authors.forename: William
authors.initials: W
authors.lastname: Van Alstine
authors.forename: James M
authors.initials: JM
authors.lastname: Edwards
authors.forename: Gregory J
authors.initials: GJ
authors.lastname: Landry
authors.forename: John A
authors.initials: JA
authors.lastname: Kaufman
authors.forename: Frederick S
authors.initials: FS
authors.lastname: Keller
authors.forename: Josef
authors.initials: J
authors.lastname: Rösch
mesh_terms: D000792:Angiography / Q000379:methods*; D000818:Animals; D002339:Carotid Arteries / Q000000981:diagnostic imaging* / Q000601:surgery*; D007413:Intestinal Mucosa / Q000637:transplantation*; D012756:Sheep; D014654:Vascular Patency